interdict vs disallow

interdict is a noun but disallow is not a noun.

Word	Noun	Adjective	Verb	Adverb
interdict	Yes	No	Yes	No
disallow	No	No	Yes	No

As verbs, interdict and disallow are synonyms defined as:

Other synonyms of interdict include forbid, nix, prohibit, proscribe, veto.

interdict (noun)	disallow (noun)
an ecclesiastical censure by the Roman Catholic Church withdrawing certain sacraments and Christian burial from a person or all persons in a particular district
a court order prohibiting a party from doing a certain activity

interdict (verb)	disallow (verb)
command against	command against
destroy by firepower, such as an enemy's line of communication